Final answer:
The Shakespeare Mas, a cultural event involving a battle of wits using Shakespeare's lines, is unique to Grenada, known as the "Spice Isle," making D) Grenada the correct answer.
Step-by-step explanation:
The Shakespeare Mas mentioned in this question is a feature of cultural festivities in Grenada, an island country referred to as the "Spice Isle." Participants in this event engage in a battle of wits by creatively using only lines from William Shakespeare's plays. This event is part of the larger celebration of Carnival in Grenada, distinguishing it from other Caribbean countries' celebrations. Among the options provided, Jamaica, Barbados, and Trinidad and Tobago do not feature the Shakespeare Mas as part of their traditional festivities. Therefore, the correct answer is D) Grenada.